What is the
popping sound I hear a few seconds after the rocket launches?

Why does
a bigger bottle help increase thrust?

BottleRocketSim
v.1.0 - Application

BottleRocketSim
v.1.0 - Simulator will open in new window. If the simulator
does not start in a new window it may be because this is a Macromedia
Flash SWF file and you will need the Flash
player to run the simulator.

For a more
accurate simulator that also models stomp rockets, and solid model rockets
, visit this site: